Find letter function

[stat1c]

I need to write a function that gets a letter from the user and checks the list to see if that letter is in the file. This is my file:
Alabama
Alaska
Arizona
Arkansas
California
Colorado
Connecticut
Delaware

#include "stdafx.h"
#include <iostream>
#include <fstream>
#include <string>
#include <conio.h>
#include <vector>
#include <algorithm>
#include <cstdlib>
using namespace std;
int main()
{
	
	//Open and read file
	std::string line_;
	ifstream file_("LIST.txt");

	if (file_.is_open())

	{
		{

			std::cout << line_ << '\n';

		}
		//Close file
		file_.close();
	}
	else
		std::cout << "File is not open" << '\n';
	std::cin.get();

	////////////////////////

		
	//Function to enter letter
		int EnterLetter();
	{
		//Declare variable for the letter
		int A;

		//Promot user for letter
		cout << "\n\nEnter a letter: ";

		//Input letter
		cin >> A;

		//Confirm the letter
		cout << "You entered" << A;

		//Return the letter
		return A;
	}
	void EnterLetterWithReference(int &A);
	{
		//Declare variable for the letter
		int A;

		//Prompt user for letter
		cout << "\n\nEnter a letter: ";

		//Input letter
		cin >> A;

		//Confirm letter
		cout << "You entered" << A;
	}
	//Function to print a letter
	void PrintLetter(int A);
	{
		//Declare variable for the letter
		int A;
		//Output the letter
		cout << "\nThe letter is" << A;
	}
	//Function to print the letters between A and Z
	void PrintLettersBetweenAAndZ(int A, int Z);
	{
		//Declare variable for the letter
		int A, Z;
		if (A < Z)
		{
			cout << "\n\nThe letters between" << A << "and" << Z << "are:";
			int k;
			for (k = A; k <= Z; k++)
				cout << " " << k;
		}
		else
		{
			//Declare variable for the letter
			int A, Z;
			cout << "\n\nThe letters between" << A << "and" << Z << "are:";
			int k;
			for (k = Z; k >= A; k--)
				cout << " " << k;
		}
	}


		bool IsBetweenZAndA(int letter, int Z, int A);
		{
			//Declare variable for the letter
			int A, Z;

			//Find if letter is between A and Z
			if ((Z <= letter) && (letter <= A))
				return true;
			else
				return false;
		}


	//Function to enter letter between A and Z
		int EnterLetterBetweenAAndZ(int A, int Z)
		{

			//Declare variable for the letter
			int Letter;
			do
			{
				//Prompt user for letter
				cout << "\n\nEnter a letter between" << A << "and" << Z << ":";
				//Input letter
				cin >> Letter
					//Confirm the letter
					cout << "You entered" << Letter;
				//Validate the letter
				if (IsBetweenAAndZ(Letter, A, Z))
				{
					//The letter is correct
					//Return the letter
					return Letter;
				}
				//If letter is incorrect
				else
					cout << "\nThe letter you entered (" << Letter << ") is not between"
					<< A << "and" << Z << ".Try again!";

			} 
			while (IsBetweenAAndZ(Letter, A, Z) == false);
			
	
}
		int _tmain(int argc, _TCHAR* argc[])
		{
			int N1;
			Ni = EnterLetter();

			cout << "\n";

			//print letter function
			PrintLetter(N1);
			PrintLetter(N2);
			PrintLetter(9);
			PrintLetter(N1 + 5);

			PrintLettersbetweenAAndZ();


			PrintLettersbetweenAAndZ();

			PrintLettersbetweenAAndZ(A, Z);
			PrintLettersbetweenAAndZ(N1, N2);
			PrintLettersbetweenAAndZ(N2, Z);
			PrintLettersbetweenAAndZ('A', 'Z');
			PrintLettersbetweenAAndZ(A, Z);

			PrintLettersbetweenAAndZ();

			int N3 = EnterLetterBetweenAAndZ(A, Z);
			cout <<"\n\nThe letter is"<< N3

			

			//Wait for a character before closing the console
			cout << "\nPress any key to continue...";
			_getch();
			return 0;
		}

Any help would be appreciated thank you for your time.

[AbstractionAnon]

Line 10: If you're using _tmain(), then you should not have main().

Line 22: What's the purpose of this line? line_ is always going to be empty.

Line 36,53,68,76,99,113: You can;t define functions inside another function (main).

Line 36,53,68,76,99: Function implementations do not have a ; after the signature.

Line 45: You're entering an int. Is that what you want?

Line 56: The local declaration of A hides the argument.

Line 66: The local variables A goes out of scope. The value entered is lost.

Line 71: The local declaration of A hides the argument.

Line 73: You're printing an uninitialized variable.

Line 79: This declaration of A and Z hides the arguments A and Z.

Line 80: You're comparing uninitialized variables.

Line 90: A and Z are uninitialized variables.

Line 102: Local declaration of A and Z hides arguments.

Line 105: You're comparing uninitialized variables.

[stat1c]

I've tried something different but when I type in a letter and press enter it gives me back a multiple numbers and closes the console before I can read it.

{
				//Function to enter letter
				int EnterLetter();

				{
					//Declare variable for the letter
					int A;

					//Promot user for letter
					cout << "\n\nEnter a letter: ";

					//Input letter
					cin >> A;

					//Confirm the letter
					cout << "You entered" << A;

					//Return the letter
					return A;
				}

				std::cout << "Write the path of the file\n";
				std::string path;
				std::cin >> path;

				std::ifstream file(path.c_str());

				if (file.is_open())
				{
					std::cout << "File '" << path << "' opened.\n";

					std::cout << "Enter Letter\n";
					std::string letter;
					std::cin >> letter;

					int countletter = 0;
					std::string candidate;
					while (file >> candidate) 
					{
						if (letter == candidate) ++countletter;
					}

					std::cout << "Letter '" << letter << "' Is valid " << countletter << " times.\n";
				}

				else
				{
					std::cerr << "Invalid letter\n";
					return 1;
				}

				}